| MyungJoo Ham | 9005b65 | 2011-10-02 00:19:28 +0200 | [diff] [blame] | 1 | What: /sys/class/devfreq/.../ |
| 2 | Date: September 2011 |
| 3 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 4 | Description: |
| 5 | Provide a place in sysfs for the devfreq objects. |
| 6 | This allows accessing various devfreq specific variables. |
| 7 | The name of devfreq object denoted as ... is same as the |
| 8 | name of device using devfreq. |
| 9 | |
| 10 | What: /sys/class/devfreq/.../governor |
| 11 | Date: September 2011 |
| 12 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 13 | Description: |
| Nishanth Menon | 0359d1a | 2012-10-29 15:01:47 -0500 | [diff] [blame] | 14 | The /sys/class/devfreq/.../governor show or set the name of the |
| MyungJoo Ham | 9005b65 | 2011-10-02 00:19:28 +0200 | [diff] [blame] | 15 | governor used by the corresponding devfreq object. |
| 16 | |
| 17 | What: /sys/class/devfreq/.../cur_freq |
| 18 | Date: September 2011 |
| 19 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 20 | Description: |
| 21 | The /sys/class/devfreq/.../cur_freq shows the current |
| Rajagopal Venkat | 7f98a90 | 2012-10-26 01:50:26 +0200 | [diff] [blame] | 22 | frequency of the corresponding devfreq object. Same as |
| 23 | target_freq when get_cur_freq() is not implemented by |
| 24 | devfreq driver. |
| 25 | |
| 26 | What: /sys/class/devfreq/.../target_freq |
| 27 | Date: September 2012 |
| 28 | Contact: Rajagopal Venkat <rajagopal.venkat@linaro.org> |
| 29 | Description: |
| 30 | The /sys/class/devfreq/.../target_freq shows the next governor |
| 31 | predicted target frequency of the corresponding devfreq object. |
| MyungJoo Ham | 9005b65 | 2011-10-02 00:19:28 +0200 | [diff] [blame] | 32 | |
| MyungJoo Ham | 9005b65 | 2011-10-02 00:19:28 +0200 | [diff] [blame] | 33 | What: /sys/class/devfreq/.../polling_interval |
| 34 | Date: September 2011 |
| 35 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 36 | Description: |
| 37 | The /sys/class/devfreq/.../polling_interval shows and sets |
| 38 | the requested polling interval of the corresponding devfreq |
| 39 | object. The values are represented in ms. If the value is |
| 40 | less than 1 jiffy, it is considered to be 0, which means |
| 41 | no polling. This value is meaningless if the governor is |
| 42 | not polling; thus. If the governor is not using |
| 43 | devfreq-provided central polling |
| 44 | (/sys/class/devfreq/.../central_polling is 0), this value |
| 45 | may be useless. |
| MyungJoo Ham | ce26c5b | 2011-10-02 00:19:34 +0200 | [diff] [blame] | 46 | |
| Jonghwa Lee | e552bba | 2012-08-23 20:00:46 +0900 | [diff] [blame] | 47 | What: /sys/class/devfreq/.../trans_stat |
| 48 | Date: October 2012 |
| 49 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 50 | Descrtiption: |
| 51 | This ABI shows the statistics of devfreq behavior on a |
| 52 | specific device. It shows the time spent in each state and |
| 53 | the number of transitions between states. |
| 54 | In order to activate this ABI, the devfreq target device |
| 55 | driver should provide the list of available frequencies |
| 56 | with its profile. |
| 57 | |
| MyungJoo Ham | ce26c5b | 2011-10-02 00:19:34 +0200 | [diff] [blame] | 58 | What: /sys/class/devfreq/.../userspace/set_freq |
| 59 | Date: September 2011 |
| 60 | Contact: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 61 | Description: |
| 62 | The /sys/class/devfreq/.../userspace/set_freq shows and |
| 63 | sets the requested frequency for the devfreq object if |
| 64 | userspace governor is in effect. |
| Nishanth Menon | d287de8 | 2012-10-25 19:48:59 -0500 | [diff] [blame] | 65 | |
| 66 | What: /sys/class/devfreq/.../available_frequencies |
| 67 | Date: October 2012 |
| 68 | Contact: Nishanth Menon <nm@ti.com> |
| 69 | Description: |
| 70 | The /sys/class/devfreq/.../available_frequencies shows |
| 71 | the available frequencies of the corresponding devfreq object. |
| 72 | This is a snapshot of available frequencies and not limited |
| 73 | by the min/max frequency restrictions. |
| Nishanth Menon | 50a5b33 | 2012-10-29 15:01:48 -0500 | [diff] [blame] | 74 | |
| 75 | What: /sys/class/devfreq/.../available_governors |
| 76 | Date: October 2012 |
| 77 | Contact: Nishanth Menon <nm@ti.com> |
| 78 | Description: |
| 79 | The /sys/class/devfreq/.../available_governors shows |
| 80 | currently available governors in the system. |